<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>浮动定位</title>
		<!-- 浮动属性：float:left、right、none -->
		<!-- 清除属性：clear：left、right、both -->
		<style>
			div{
				width: 300px;
				height: 300px;
				border-radius: 50%;
				/* 浮动 */
				 float: right; 
				font-size: 10em;
			    text-align: center;
			    line-height: 300px;/*文本行高属性*/ 
			}
			#d1{
				background-color: #ee1e83;
			}
			#d2{
				background-color: #ff55ff;
			}
			#d3{
				background-color: #ff0000;
				 clear:right; 
			}
			#d4{
				background-color: #550000;
			    clear: both; 
			}
		</style>
	</head>
	<body>
		<!-- 页面排版：左右形式---浮动，元素变成块，飘起来，父级左右点 -->
		<div id="d1">1</div>
		<div id="d2">2</div>
		<div id="d3">3</div>
		<div id="d4">4</div>
	</body>
</html>